Hydrogen
The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorous acid is
The number of hydrogen atom(s) attached to phosphorus atom in hypophosphorous acid is
- zero
- one
- two
- three
Very pure hydrogen (99.9%) can be made by which of the following processes
Very pure hydrogen (99.9%) can be made by which of the following processes?
- Reaction of salt like hydrides with water
- Reaction of methane with steam
- Mixing natural hydrocarbons of high molecular weight
- Electrolysis of water
In curing cement plasters, water is sprinkled from time to time. This helps in
In curing cement plasters, water is sprinkled from time to time. This helps in
- keeping it cool
- developing interlocking needle like crystals of hydrated silicates
- hydrating sand and gravel mixed with cement
- converting sand into silicic acid